GE IS200VAICH1C Analog I/O Board | Mark VI

GE IS200VAICH1C Analog Input/Output Board

The General Electric IS200VAICH1C is a VME Analog I/O Board for Mark VI turbine control systems. This VAIC module provides 20 analog inputs and 4 analog outputs for industrial gas and steam turbine applications. It supports both simplex and triple modular redundant configurations.

Technical Specifications

• Manufacturer: General Electric (GE)
• Model Number: IS200VAICH1C
• Series: Mark VI Speedtronic
• Product Type: VME Analog I/O Board
• Functional Acronym: VAIC
• Input Channels: 20 analog inputs
• Output Channels: 4 analog outputs
• PCB Coating: Conformal Coating
• Revision: Primary Functional Revision C
• Manual Reference: GEH-6421
• Weight:1.75kg

I/O Channel Configuration

• 20 analog input channels for voltage or 4-20 mA signals
• 4 analog output channels (2 configurable as 4-20 mA or 0-200 mA)
• Signal conditioning with noise suppression circuitry
• Analog multiplexer and A/D conversion for inputs
• D/A conversion for output current generation
• Hardware and software filtering capabilities

System Architecture

• Operates within Mark VI VME processor rack systems
• Communicates via VME backplane to VCMI board and controller
• Supports simplex configuration with single VAIC board
• Enables triple modular redundancy (TMR) with three boards
• Features median value voting for fault-tolerant outputs

Terminal Board Compatibility

• Works with TBAIH1B or earlier terminal boards
• Compatible with all revisions of DTAI terminal boards
• Each terminal board accepts 10 inputs and 2 outputs
• Supports up to 500Ω load resistance with 1000ft #18 wire
• Features board identification and validation system

Diagnostic and Monitoring Features

• Three front panel LEDs (RUN, FAIL, STATUS)
• Hardware limit checking for each analog input
• Configurable system limit checking with alarm generation
• Output current monitoring and suicide relay protection
• TMR channel comparison for early fault detection

Compressor Stall Detection

• Integrated firmware for gas turbine compressor monitoring
• Executes stall detection algorithms at 200 Hz rate
• Supports both small LM and heavy-duty gas turbines
• Uses pressure transducer inputs for stall prediction
• Initiates shutdown signals through relay outputs

Frequently Asked Questions (FAQ)

• How many I/O channels does it have? 20 analog inputs and 4 analog outputs.
• What configurations does it support? Both simplex and triple modular redundant systems.
• What terminal boards are compatible? TBAIH1B, DTAI series, and earlier versions.
• What is the output current capability? Two outputs at 4-20mA, two configurable 4-20mA/0-200mA.
• What diagnostic features are included? LED status, limit checking, TMR voting, and fault detection.